I'm not 100% sure this is actually word-for-word, but alas. "In a presentation at Ubuntu Developer Summit currently going on in Denmark, Drew Bliss from Valve said that Linux is more viable than Windows 8 for gaming. Windows 8 ships with its own app store and it is moving away from an open platform model." I feel like a broken record by now but here we go again: keep an eye on Valve, even if you're not into games. This is the company pushing NVIDIA and AMD to improve their Linux support, with enough clout and name to actually get stuff done. Valve doesn't mess around.

I am not sure if users will make the shift to Linux at all.
People that play on Steam have Windows running and most of the times also other games that are non steam.

Even if i applaud the attempt to open the gate for Linux, i am not convinced that Linux will the new gaming platform in the future. Of course it can be, but i just can't imagine it.
Unless of course MS goes out of business.
It seems more like an option and testing what they can do with Linux and building demand on Linux.
If its running i will try it out but Linux has still some obstacles. With my 7 year old motherboard i always have problem even to get my Logitech webcam to be recognized.
If we would get Android for desktop maybe all that would change. How knows.